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authorGerd Hoffmann <kraxel@redhat.com>2015-10-12 12:03:49 +0200
committerGerd Hoffmann <kraxel@redhat.com>2016-02-23 12:04:39 +0100
commit1e3165980c352f90d0f1295bfc4fbfa31193b13f (patch)
treeb9a8eeb9f27bb23cfbbc232e31bf12be54f6d006 /ui
parent014cb152b8219a2cd31ce6443f8708386ded751b (diff)
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egl-helpers: add functions for render nodes and dma-buf passing
Adds helpers to open a drm render node and create a opengl context for it. Also add a helper to export a texture as dma-buf. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Diffstat (limited to 'ui')
-rw-r--r--ui/egl-helpers.c129
1 files changed, 129 insertions, 0 deletions
diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c
index 4c83834..54be44c 100644
--- a/ui/egl-helpers.c
+++ b/ui/egl-helpers.c
@@ -1,6 +1,8 @@
#include "qemu/osdep.h"
#include <glob.h>
+#include <dirent.h>
+#include "config-host.h"
#include "ui/egl-helpers.h"
EGLDisplay *qemu_egl_display;
@@ -20,6 +22,133 @@ static int egl_debug;
/* ---------------------------------------------------------------------- */
+#ifdef CONFIG_OPENGL_DMABUF
+
+int qemu_egl_rn_fd;
+struct gbm_device *qemu_egl_rn_gbm_dev;
+EGLContext qemu_egl_rn_ctx;
+
+int qemu_egl_rendernode_open(void)
+{
+ DIR *dir;
+ struct dirent *e;
+ int r, fd;
+ char *p;
+
+ dir = opendir("/dev/dri");
+ if (!dir) {
+ return -1;
+ }
+
+ fd = -1;
+ while ((e = readdir(dir))) {
+ if (e->d_type != DT_CHR) {
+ continue;
+ }
+
+ if (strncmp(e->d_name, "renderD", 7)) {
+ continue;
+ }
+
+ r = asprintf(&p, "/dev/dri/%s", e->d_name);
+ if (r < 0) {
+ return -1;
+ }
+
+ r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
+ if (r < 0) {
+ free(p);
+ continue;
+ }
+ fd = r;
+ free(p);
+ break;
+ }
+
+ closedir(dir);
+ if (fd < 0) {
+ return -1;
+ }
+ return fd;
+}
+
+int egl_rendernode_init(void)
+{
+ qemu_egl_rn_fd = -1;
+
+ qemu_egl_rn_fd = qemu_egl_rendernode_open();
+ if (qemu_egl_rn_fd == -1) {
+ fprintf(stderr, "egl: no drm render node available\n");
+ goto err;
+ }
+
+ qemu_egl_rn_gbm_dev = gbm_create_device(qemu_egl_rn_fd);
+ if (!qemu_egl_rn_gbm_dev) {
+ fprintf(stderr, "egl: gbm_create_device failed\n");
+ goto err;
+ }
+
+ qemu_egl_init_dpy((EGLNativeDisplayType)qemu_egl_rn_gbm_dev, false, false);
+
+ if (!epoxy_has_egl_extension(qemu_egl_display,
+ "EGL_KHR_surfaceless_context")) {
+ fprintf(stderr, "egl: EGL_KHR_surfaceless_context not supported\n");
+ goto err;
+ }
+ if (!epoxy_has_egl_extension(qemu_egl_display,
+ "EGL_MESA_image_dma_buf_export")) {
+ fprintf(stderr, "egl: EGL_MESA_image_dma_buf_export not supported\n");
+ goto err;
+ }
+
+ qemu_egl_rn_ctx = qemu_egl_init_ctx();
+ if (!qemu_egl_rn_ctx) {
+ fprintf(stderr, "egl: egl_init_ctx failed\n");
+ goto err;
+ }
+
+ return 0;
+
+err:
+ if (qemu_egl_rn_gbm_dev) {
+ gbm_device_destroy(qemu_egl_rn_gbm_dev);
+ }
+ if (qemu_egl_rn_fd != -1) {
+ close(qemu_egl_rn_fd);
+ }
+
+ return -1;
+}
+
+int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc)
+{
+ EGLImageKHR image;
+ EGLint num_planes, fd;
+
+ image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(),
+ EGL_GL_TEXTURE_2D_KHR,
+ (EGLClientBuffer)(unsigned long)tex_id,
+ NULL);
+ if (!image) {
+ return -1;
+ }
+
+ eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc,
+ &num_planes, NULL);
+ if (num_planes != 1) {
+ eglDestroyImageKHR(qemu_egl_display, image);
+ return -1;
+ }
+ eglExportDMABUFImageMESA(qemu_egl_display, image, &fd, stride, NULL);
+ eglDestroyImageKHR(qemu_egl_display, image);
+
+ return fd;
+}
+
+#endif /* CONFIG_OPENGL_DMABUF */
+
+/* ---------------------------------------------------------------------- */
+
EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win)
{
EGLSurface esurface;